Cutaway Bus August 2004



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PowerPlusWaterMarkObject3Cutaway Bus ________________ August 2004



PUBLICATION
This specification is a product of the Texas Department of Transportation (TxDOT). It is the practice of TxDOT to support other entities by making this specification available through the National Institute of Governmental Purchasing (NIGP). This specification may not be sold for profit or monetary gain. If this specification is altered in any way, the header, and any and all references to TxDOT must be removed. TxDOT does not assume nor accept any liability when this specification is used in a procurement process by any other entity.
TECHNICAL SPECIFICATIONS-DEDICATED PROPANE

(ULSD option available)

LIFT-EQUIPPED TRANSIT VEHICLES

1.0 GENERAL REQUIREMENTS


    1. The purpose of this specification is to provide a transit quality vehicle manufactured on a standard cutaway chassis with provision for stand-up entry, a wheelchair lift and tie downs as depicted on the floor plan attached to these specifications. All body, floor and roof joints must be tightly sealed to eliminate drafts and water leaks. Vehicle shall exhibit attention to workmanship and detail. Used, shopworn, or prototype vehicles are not acceptable. Vehicles furnished to these specifications must meet or exceed all requirements herein.


ALL VEHICLES DELIVERED IN ACCORDANCE WITH THIS SPECIFICATION MUST MEET THE REQUIREMENTS OF THE AMERICANS WITH DISABILITIES ACT (ADA).
1.2 Vehicle components, assemblies, and accessories shall be standard production items unless otherwise specified herein. These features include but are not limited to: adjustable instrument lights, interior sun visor, exterior backup lamps, variable speed windshield wipers, windshield washers, windshield defroster, coolant recovery system, etc. Standard and other common features if not specifically stated shall not be interpreted as items that can be omitted to reduce price or to provide any other bidding advantage. The vehicles and all related equipment shall be designed to permit ready accessibility for maintenance purposes with minimal disturbances of other components and assemblies. All vehicles supplied under these specifications shall be in full compliance with Federal Motor Vehicle Safety Standards (FMVSS) as established by the Department of Transportation and FTA guidelines.
1.3 The BIDDER has sole responsibility for, and shall provide the vehicle as specified with all certifications, warranties, and special equipment to the Agency as a completed vehicle.
2.0 Reserved

3.0 GENERAL DIMENSIONS
Wheelbase......................................................…138" min.

Interior height from floor to ceiling........................72" min.

Interior height from floor to ceiling at aisle............75" min.

Height at first step................................................12" max.

Height at passenger door entrance.......................78" min.

Aisle width............................................................16" min.

Interior width at floor level....................................76" min.


    1. In order to assure a smooth ride, wheelbase and overall body length should be selected to avoid excessive overhang behind rear wheels, (not more than 50% of the wheelbase).



4.0 SUSPENSION AND GROSS VEHICLE WEIGHT
Gross Vehicle Weight Rating...............................10,500 lbs. min.

Front Axle Capacity................................................4,600 lbs. min.

Rear Axle Capacity................................................ 7,500 lbs. min.

Front Springs..........................................................3,800 lbs. min.

Rear Springs....................................................... ...7,800 lbs. min.

4.1 Minimum of ten thousand and five hundred (10,500) pounds, or higher if required, to support the loaded weight of the completed vehicle including any optional equipment selected. It is the bidder's responsibility to calculate the actual loaded weight and to provide a heavier chassis, tire, wheel, spring or axle combination if required.


4.2 Shock absorbers shall be gas type, heaviest available as specified by chassis manufacturer.
4.3 Suspension system shall have conventional leaf springs on the rear and coil type springs on the front. Suspension shall be of proper design and suitable capacity. Springs shall have anti-squeak characteristics. The suspension system shall accommodate the additional weight of the lift on the curb side of vehicle.
4.4 Reserved
4.5 The rear axle and final drive must be of conventional construction, a truck-type rear axle using heavy tubes pressed into cast center section or one-piece casting.
4.6 Ring gear should be bolted, not riveted, to differential carrier.
4.7 A differential with the appropriate gear ratio to match the power train is required. The vehicle should be designed to operate at sixty (60) M.P.H. at 3500 RPM or less.

5.0 ENGINE
5.1 Engine shall be of the latest design electronic controlled five point four liter (5.4) incorporating all features which will minimize emissions and maximize the life of the engine.
5.2 Engine shall be emissions certified and shall comply with all Federal and State laws and regulations with regard to air and noise pollution and safety that are in effect on the date of manufacture.
5.3 The noise level generated by the engine and other vehicle systems shall not exceed sixty (60) decibels at any point inside the passenger compartment, under normal operating conditions, with the windows closed.
5.4 The engine and components are to be arranged and mounted so as to provide convenient access for servicing the engine and all of its accessories.

6.0 FUEL SYSTEM: Gasoline to Liquefied Petroleum Gas Conversion.

6.1. Conversion Features - The engine shall be fueled to operate on liquefied petroleum gas. The engine, fuel system, and all related components shall meet all applicable requirements. Conversion system shall incorporate an adaptive learn system which automatically compensates for variations in fuel composition, altitude, and temperature. Fuel system shall be computer controlled through OEM interface or using an auxiliary system. Fuel delivery shall be accomplished through computerized fuel injection.



6.1.1 LPG fuel system - Throttle-body air/ fuel controller, single exhaust system

6.1.2 LPG fuel tank: - 37 Gas-Gallons Equivalent tank. The tank shall be a specialty tank manufactured by the Sleeger Group, Manchester Tank, or approved equal, with dimensions: 14 x 14 x 34.

6.1.3 Fuel level sensor - Electronic

6.1.4 LPG fill valve - Side fuel door

6.1.5 Fuel selection switch - An electrical fuel selection switch is to be provided on the instrument panel or in a location convenient to the vehicle operator. This switch shall allow the operator to select gasoline operation or LPG operation and shall be permanently marked. The operator shall not have to operate any other controls in switching from one fuel to the other, unless required by the conversion system manufacturer.

      1. Refueling Receptacle ‑ The vehicle refueling receptacle shall be the industry standard. The receptacle must be protected with a dust cap, permanently attached to the vehicle. All conversion systems will have a remote refueling receptacle unless otherwise specified by the ordering agency. The remote fill receptacle shall be enclosed in a hinged remote fill box unless otherwise specified by the ordering agency. The remote refueling receptacle shall be located as near to the gasoline filler location as possible.

6.1.7 Shut‑off Valve ‑ A manual shut‑off valve to isolate the fuel tank from the rest of the LPG system must be provided and labeled as required by the Railroad Commission of Texas.

6.1.8 Fuel Gauge ‑ The OEM fuel gauge is to be utilized to provide accurate available fuel readings for both gasoline and LPG selectively with the fuel in use. A separate OEM quality fuel gauge with numerical (Digital Preferred) display for LPG is to be installed and mounted so that is can be easily observed by the seated driver if the OEM fuel gauge is incompatible with the LPG system.

      1. Filter - An in-line disposable fuel filter shall be provided featuring welded stainless steel, high strength construction and integral fittings, 3/8" SAE 45 degree flare. Preventive maintenance instructions are to be provided in accordance with Section 50.

      2. Vaporizer - A vaporizer shall be provided equipped with a two-stage hi-flow regulator that provides the system with a fuel at a consistent operating pressure and temperature. The vaporizer shall feature a high-efficiency heat exchanger, balanced output pressure regulation, and an integral pressure relief valve.

6.2. Installation and Operation ‑ The installation of the LPG fuel system and the operation of the vehicle after conversion shall be in accordance with the following:

      1. Installation ‑ The installed conversion system is to present a neat, OEM quality appearance and shall be free of all defects affecting appearance, useful life, or serviceability. The installed systems must not interfere with routine maintenance tasks such as tune ups, checking of fluid levels, the replacement of spark plugs, distributor caps and rotors, or drive belts nor render inoperative the functions of the air filter, air connection, or any component of the emission control system of the vehicle unless approved under EPA guidelines. All electrical wiring is to be insulated and enclosed in a fibrous loom, plastic loom, or flexible conduit for protection from external damage and short circuits. Wiring is to be securely fastened at sufficient intervals to prevent sagging and ensure clearance of mechanical parts. Routing of the wiring through the sub‑frame, body, etc., shall not interfere with normal operation or present a safety hazard. Rubber/plastic grommets are be used wherever wires, harness or fuel lines pass through metal. Workmanship shall be comparable to that of the vehicle OEM. The systems shall be installed to conform to the system manufacturer's instructions and recommendations.

6.2.2 Connections ‑ All hose connectors and fittings shall be compatible. All electrical connections to the vehicle OEM wiring shall be accomplished with stainless steel, brass or copper connectors or soldered. Aluminum connectors are not acceptable. Interconnecting wires shall be uniquely color coded and identified in the alternative fuel system electrical schematic.

6.2.3 Engine Tune‑up ‑ Each conversion system installation is to be made only after the engine has been tuned to OEM specifications.

6.2.4 Engine Operating Characteristics ‑ The engine, after conversion, is to operate on LPG without hesitation, stalling, power loss of more than 15%, or surging. The OEM's recommended maximum operating temperature, horse‑power, engine speed, etc. shall not be compromised or surpassed. The engine shall start on either gasoline or LPG within 5 seconds after cranking.

      1. Safety ‑ The engine, after conversion, is to meet all federal and state safety rules and regulations, all applicable EPA emission standards, DPS Vehicle Inspection Rules, and TNRCC Regulation IV.

6.2.6 OEM Engine Speed Governor ‑ Any OEM engine speed governor is not to be made inoperable during conversion to LPG. It shall remain operable when the vehicle is operating on LPG as well as on gasoline.

6.2.7 OEM Fuel Injection SystemThe fuel delivery system of gasoline engines, if used, shall be made inoperable by means which will not damage the injectors and associated components, while the engine is operating on LPG and shall not be damaged by the use of LPG.

      1. OEM Air Canister - Whenever the OEM air canister is removed and replaced, a fully enclosed all metal air canister shall be provided. The use of silicon sealer to provide air tightness on an air canister/air filter assembly is prohibited. Modifications to OEM air canister/air filter assemblies shall be restricted to minor modifications required in the conversion system manufacturer's installation instructions.

      2. Engine Electronics - All electronics are required to properly interface with the original vehicle electronics to meet vehicle performance and emission objectives. The vehicle OEM engine management computer and its permanent control memory shall not be modified, removed, replaced or otherwise altered. The computer and electronic systems must be of closed loop design with adaptive learn capabilities and self-adjusting strategies built into the system allowing for the optimization of the ignition system's timing curve for LPG. The learning algorithms must enable the unit to learn its power and idle points automatically. The mixer must be fixed venturi type with no moving parts. On-Board OEM diagnostics are not to be adversely affected or over-ridden by the conversion system. Electrical Wiring is to be color coded to match the vehicle manufacturer's electrical wiring color scheme.

      3. Alternative Fuel Decals - A decal is to be located under the hood, easily visible to the operator upon opening. The decal shall state that this is a LPG fueled vehicle. A second decal is to be added under the hood showing name, address, and phone number of the conversion vendor. The vehicle shall also be furnished with a diamond LPG alternative fuel decal in accordance with National Fire Protection Association # 58 (LPG gas code).

      4. Anti-Tampering - Conversion system shall comply with EPA anti-tampering rules, and shall be designed so as to prohibit tampering, and shall not have an adjustable converter.

6.3 Warranty Requirements
6.3.1 INTEGRATED CONVERSION SYSTEM - All conversion system components including all electronic fuel management controls are warranted as an integrated system. All conversion systems are warranted against all defects in material and workmanship for a period of not less than 12 months or 12,000 miles, whichever comes first, and shall cover 100 percent parts and labor. If the manufacturer's standard warranty period exceeds 12 months or 12,000 miles, then the standard warranty period shall be in effect. The warranty begins on the day the purchaser accepts the vehicle.

6.3.2 WARRANTY PERIOD RESPONSIBILITIES - During the warranty period the vendor will be responsible for labor, materials, and other costs as outlined below associated with required warranty repair. It is the intent of this warranty that the vendor performs all warranty repair work. However, should the vendor fail to complete the required warranty repairs within three working days of notification of the reported failure, at the purchasing entity's option, the purchasing entity may perform warranty repairs or have them performed commercially at the vendor's expense.


      1. WARRANTY REPAIRS - When warranty repairs are required, the purchasing entity will notify a representative of the vendor's Texas dealer by telephone at the location and the telephone number designated by the vendor on the Warranty Certification as the point of contact. Major warranty repair work for the purpose of this specification means major repairs to the alternative fuel system and major repairs to any other components of the system. Diagnosis of the actual repairs required will be the responsibility of the vendor. The unit will be made available at the purchasing entity's facility within a 100-mile (161 km) radius of the FOB point shown on the purchase order. The repair work may be performed by the vendor or their authorized representative.




      1. TOWING COSTS - The purchasing entity may transport the unit to the vendor's location or authorized repair facility (within the boundaries of the state of Texas), in accordance with the warranty agreement, which should allow for vendor to perform diagnostics and provide alternative remedies prior to third party towing at the vendor’s expense.


      1. RESPONSE TIME - Warranty repair action shall begin within five working days after the vendor is notified of the need for warranty repairs. A representative of the vendor's Texas dealer will be notified by telephone with a letter or fax confirmation at the location, telephone and fax number designed by the vendor on the warranty certification as the point of contact. The vendor shall notify the purchasing entity immediately of any change in this location, telephone with a letter or FAX confirmation at the location, telephone and/or FAX number. The warranty repairs should be completed and the unit returned to the purchasing entity (or picked up by the purchasing entity at the vendor's expense as outlined above) within a reasonable period of time (three working days).




      1. PARTS AND SERVICE - The manufacturer of the equipment furnished shall have an authorized dealer within the state of Texas. The authorized dealer shall have factory-trained personnel available for warranty repairs and the performance of service. The dealer shall maintain an inventory of high-usage parts and a quick source of low-usage parts.




      1. WARRANTY DISPUTES - If there is any dispute between the vendor and OEM on the cause of an LPG conversion malfunction, it shall automatically become the vendor's responsibility to determine the cause and provide necessary repairs. If the question is not resolved within seven (7) working days from the date of notification to the vendor by the purchasing entity, the vendor will arrange, with the permission of the purchasing entity, for the vehicle to be repaired by a duly licensed technician, at an EM dealership or other facility selected by the purchasing entity, at no cost to the purchasing entity. The vendor may then negotiate with the EM if the repair is covered by the EM warranty or pay for the repairs if it is not, unless it can be determined that the malfunction was due to improper operation such as low oil, low water, etc.


6.3.8 GENERAL ENGINE WARRANTY - The vendor shall warrant converted engines for a minimum of six (6) months or 6,000 miles, whichever occurs LATER against damages due to the operation of the engine on LPG. This warranty shall be equal to or exceed the OEM original warranty on the engine and shall be limited to damages caused by the alternative fuel used.
7.0 EXHAUST SYSTEM
7.1 The vehicles shall be equipped with an exhaust system that meets Federal and State noise level and exhaust emission requirements. The exhaust pipe shall terminate just ahead of the rear corner of the vehicle, exhausting to the street side, and shall be constructed so that it will not cause back pressure in the motor or damage to the paint, bumper, chassis or wiring components of the vehicle. Flexible tubing will not be permitted in exhaust system. An adequately sized, aluminized steel, long-life muffler shall be used.
7.2 The exhaust system shall be secured in place with a hanger system. No part of the exhaust shall hang below the departure angle to the rear bumper bottom.

8.0 COOLING SYSTEM
8.1 Heavy duty to manufacturer's recommended standards. Coolant recovery system shall be factory installed. It shall be super cooling or heavy duty cooling. The cooling system shall have a permanent glycol base antifreeze to protect the system to -20º F. and shall maintain engine temperature not to exceed manufacturer's recommended normal operating temperature.
8.2 The cooling system shall have a high temperature warning buzzer and light and shall shut the engine off in 45 seconds from initial warning.

9.0 TRANSMISSION
9.1 Transmission shall be an automatic shift, four (4) speed forward and a reverse gear with an auxiliary oil cooler capable of handling extreme temperature associated with transit type operations.
9.2 The transmission shift lever shall be interlocked with the starting motor to prevent engagement of starter in any gear position other than park.
9.3 The transmission shall be equipped with an interlock feature that prevents the vehicle from being shifted out of the park position until the lift doors are closed, the lift master switch is off, and the parking brake is released.
9.4 A backing warning signal shall be provided in accordance with section 41.5.
10.0 DRIVE SHAFT
A drive shaft yoke and guard shall be provided to prevent the drive shaft from dropping to the ground or from whipping through the vehicle floor if it becomes broken or separated.

11.0 STEERING AND CONTROLS
11.1 Heavy duty power steering linkage type shall be provided.
11.2 The steering shall be power assist and shall incorporate a tilt feature. Steering from full left to full right turn shall be accomplished in no more than five (5) complete turns of the wheel.
11.3 The steering wheel shall be no less than fifteen (15") inches nor more than twenty (20") inches in diameter. The wheel ring shall be of all plastic or synthetic resin construction, molded over metal. It shall be provided with puller holes in the hub so to permit use of a standard or Universal puller.
11.4 All steering linkage wear points, including tie rod ends, shall be fitted with lubrication fittings and replaceable bushings or inserts.

11.5 The following controls, in addition to normal steering, braking, and transmission functions are to be provided:


11.5.1 Column-mounted turn signal lever.
11.5.2 Emergency flasher control facing driver and clearly visible.
11.5.3 Master exterior light switch including clearance or marker lights.
11.5.4 Switches and temperature controls for passenger compartment heaters, defrosters.
11.5.5 Separate switch and temperature controls for driver heaters, defrosters.
11.5.6 Heavy duty electric variable speed windshield wipers controlled by a variable speed switch or two speed wipers with intermittent feature shall be furnished. Wiper motor shall be mounted in an easily accessible location for ease in inspection, maintenance and removal. Minimum eighteen (18") inch wiper blade and arm providing 1,037 square inches of wiped area with one hundred and ten degrees (110º) of wiping arc. Windshield washer reservoir shall be mounted in an accessible area and pump shall be electronically operated.

11.6 All controls are to be within arm's reach of a five foot (5'0") driver with seat belt fastened.


11.7 All body switches are to be of uniform type, either push-pull or rocker type, mounted in convenient grouping in a panel near the driver.
11.8 All controls and switches shall be plainly and permanently marked. Painted masking is unacceptable.
11.9 The control panel and a supplemental driver's control panel shall be located convenient to the driver's seated position and in full view of the driver.
11.10 Lift power master switch shall be protected by a switch cover. No switches or instruments shall be obstructed controls, trim panels, or other appurtenances, and shall be arranged in a consistent and uniform manner.


12.0 ELECTRICAL SYSTEM
12.1 The vehicle is to be equipped with a twelve (12) volt extreme duty electrical system. All components are to be selected and integrated to function in an environment characterized by low engine (alternator) speeds and high amperage draws (due to lights, wheelchair lift, flashers, air conditioning or heater, and other accessories operating constantly and simultaneously.)
12.2 An alternator of at least two hundred (200) amperes output at normal engine speed and an idle output of at least one hundred twelve (112) amperes is required. The idle output shall be achieved at an engine speed of no more than seven hundred (700) R.P.M. At no time should the ampere output be less than one hundred and ten percent (110%) of loaded draw.
12.3 Starter shall be capable of turning over engine with SAE 40W oil after ten (10) hour cold soak at zero degrees Fahrenheit (0°F).
12.4 The vehicle shall be equipped with a fast idle solenoid with manual switch, volt sensor and light that will automatically shut off when brake is applied and transmission is placed in gear. Solenoid is to be original equipment manufacturer parts (OEM) only.


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